Shaft for talking-machines



A. VASSELLI.

SHAFT FOR TALKING MACHINES.

APPLICATION FILED JULY 3. 1918.

1,328,065. Patented Jan. 13,1920.

lik. 11 5 UNITED STATES PATENT onnicn. f

ANTHONY VASSELLI, 0F NEWARK, NEW JERSEY, ASSTGNOR, BY MESNE ASSIGNMENTS, T0 HARRIMAN NATIONAL BANKLOF CITY OF NEW YORK.

SHAFT FOR TALKINGJVIACHINES.

Specification of Letters Patent.

Patented Jan. 13, 1920.

Application filed. July 3, 1918. Serial No. 243,217.

To all whom it may concern:

Be it known that I, ANTHONY VASSELLI, a citizen of the United States, and a resident of the city of Newark, county of Essex, and State of New Jersey, have invented a certain new and useful Shaft for Talking-Machines, of which the following is a specification.

My invention relates to improvements in turn-table shafts. This shaft in the disk type of talking machines is vertically arranged and is adapted to carry on its upper end the turn-table which supports the rec ord disk. The turn-table must not be rigthe same with the tapered mandrel is practically equivalent to fastening the turn-table to the shaft, and the sudden starting of the turn-table under the influence of the motor spring, and especially with the sound-box stylus in engagement with the record groove, will cause the governor, which is driven from the shaft to tremble and chatter. The vibrations set up in the governor will cause irregular speed and noises which will interfere with the proper reproductions of the machine.

The objects of my invention are to provide a turn-table shaft which will solidly support the turn-table and by means of which the motor may start the rotation of the shaft before the turn-table starts tomove. 7

A further object of the invention is the provision of means for supporting and retaining the turn-table upon the shaft so as to facilitate the easy starting of the motor and to secure a better reproduction.

A further object of the invention is the provision of means of the character described, which are extremely simple in construction, neat and attractive in appearance, thoroughly reliable and efficient in its purpose, and inexpensive and economical to manufacture, and which may be easily repaired when desired.

With these and other objects in view to be more fully set forth hereinafter, the invention consists in the novel construction, combination of elements, and arrangement of parts which will be exemplified in the con struction hereinafter described in the specification and illustrated in the accompanying drawings considered together or separately.

The inventive idea involved is capable of receiving a variety of mechanical expressions, one ofwhich for the purpose of illustrating the invention, is shown in the accompanying drawings.

The invention will be first described in connection with the accompanying drawings, wherein similar reference characters are used to designate corresponding parts throughout the several views, and then more specifically defined and indicated in the appended claims.

In the drawings,-

Figure 1 is a side elevation of a turntable shaft embodying my invention;

Fig. 2 is an enlarged sectional view of the same showing a turn-table in position; and

Fig, 3 is a section on the line 33 of Fig. 2.

In carrying out my invention, I provide a shaft 1, which to outward appearances is substantially the same as the usual talking machine turn-table shaft of the tapered mandrel type. The lower extremity of the shaft is reduced to form a spindle 2 adapted to be seated in a step bearing in the frame of the motor (not shown). Formed integrally on the shaft is a pinion 3 which forms one of the train of gears by which the shaft is driven from the motor spring or springs '(not shown). The shaft carries a worm Wheel 4: adapted to engage and drive a worm on the shaft of a governor (not shown).

The upper portion 5 of the shaft is reduced in diameter, and is of cylindrical shape, and its upper extremity is rounded to improve the appearance of that exposed portion of the same. The reduced portion of the shaft may be provided with shoulders 6, 6, for the purpose of reducing the friction surface.

Carried on and surrounding the reduced portion of the shaft is a slip or sleeve 7. This sleeve has a cylindrical bore 8 of a diameter suflicient to permit of a working fit with the shoulders 6, 6 when employed, or with the reduced portion 5 of the shaft when such shoulders are not present. The

sleeve rests upon a shoulder 9 formed by the change in diameter of the shaft, caused by the reduced upper portion 5 of said shaft.

The exterior surface of the sleeve 7 is conical or tapered, and may be reduced in diameter between its extremities to reduce the friction surface.

The sleeve is secured in position on the shaft by means of a screw 10. The head of the screw is preferably of the same diameter as the body thereof, and the perforation 11 in the sleeve in Which the head rests, is of a slightly greater diameter than the head. I have found in practice that good results are obtained if the hole 11 is about .01 inch larger than the head of the Screw 10. This will permit of a certain amount of lost motion between the shaft and sleeve, and the shaft may move relatively to the sleeve when the motor starts, This will permit the governor to get in motion before the sleeve starts moving,

' After the parts of the shaft are assembled, a finishing cut over the taper sleeve is made to true the same with the shaft.

The turnetable 12 is provided at its cen-. ter with a boss 13 which has a tapered bore adapted to make a close fit with the exterior, tapered surface .of the sleeve, whereby the turn-table will be rotated.

In the manufacture of shafts having tapered mandrels, a great many are spoiled before the automatic machines can beset to cut the proper taper, and should the machine get out of adjustment while running other shafts will not have the proper taper. If a solid shaft be employed, the entire shaft is worthless and the cost of the material and the work on it are lost. By my invention,

should the same faults develop only the small and comparatively inexpensive sleeve need be discarded, and a new one substituted. The remainder of the shaft which is the most expensive i s.not injured or destroyed but is utilized with the new or substitute sleeve.

In accordance with the provisions of the I patent statute, I have described the principle of my invention together with the apparatus which I now consider to represent the best embodiment thereof, but I desire it un rsto d th t my i nt on is n fin d t h pa ticular for of ppa us herein shown and described, the same being merely illustrative, and that the invention can be carried out in other ways without departing from the spirit of my invention, and, therefore, I claim broadly the right to employ all equivalent instrumentalities coming within the scope of the appended claims, and by means of which objects of my invention are attained, and the new results accomplished, as herein set forth, as it is obvious that the particular embodiment herein shown and described is only one of many that can be employed to attain these objects and accomplish these results.

Having now described my invention, what I claim a d des e o se e by Le ter Patent is as fellows 1 A tu n b e ha t r t lkin e n ha n the n m ns or i in the governor and means for driving the turn e, h turn tab r v n me s ha i a 0 t o on onne t n i h t e h ft.-

2- A tur tab e sh t f r ta king mahine motor avin a ri in elem nt x d y at ereto a ap ed t d e the governing mechanisms and a sleeve reo a ly mou e ther on f ing a b h ing to receive the turn table and a lost motion connection between the sleeve the shaft said sleeve being tapered on its exterior to receive the turn table thereover.

3; A turn table shaft for talking machine motors, a sleeve engaging said shaft, a screw for securing said sleeve to the shaft, there being an opening in the sleeve ene s by said s ew, ai p n ng be ng wider than the screw.

4. A turn table shaft for talking machine motors having an upper portion of reduced diameter, with two spaced apart circumferential shoulders thereon, a removable bushing of uniform internal diameter r u hout f i ti na ly n n ever s spaced apart shoulders, said bushing being tapered on its exterior to receive a turn table.

his sp ifi atio igned d w tnes ed this 28th day of June, 1918 ANTHONY VASSELLI.

Witnesses:

NO MAN E- $I J H L. Les on. 

